<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        let _sex = "男";
        class Person {
            constructor(name,age){
                this.name = name;
                this.age = age;
            }
            get sex(){
                return _sex;
            }
            set sex(value){
                _sex = value;
            }
        }
        let p1 = new Person("tom",18,"男");
        console.log(p1);
        p1.age = 20;
        p1.sex = "女";
        console.log(p1);
    </script>
</body>
</html>